Halloween 2011
Credit: Retna (2); GSI Media; Splash News

What did your favorite celebrities wear this Halloween? Kim Kardashian got green as Poison Ivy, Today show anchor Ann Curry took a royal turn as Kate Middleton, Heidi Klum went scary skeletal, and Gwen Stefani looked princess-like as Cinderella. And that's not all! See more star costumes in the gallery!